1de57606cSSage Weil #ifndef _FS_CEPH_SUPER_H 2de57606cSSage Weil #define _FS_CEPH_SUPER_H 3de57606cSSage Weil 4de57606cSSage Weil #include "ceph_debug.h" 5de57606cSSage Weil 6de57606cSSage Weil #include <asm/unaligned.h> 7de57606cSSage Weil #include <linux/backing-dev.h> 8de57606cSSage Weil #include <linux/completion.h> 9de57606cSSage Weil #include <linux/exportfs.h> 10de57606cSSage Weil #include <linux/fs.h> 11de57606cSSage Weil #include <linux/mempool.h> 12de57606cSSage Weil #include <linux/pagemap.h> 13de57606cSSage Weil #include <linux/wait.h> 14de57606cSSage Weil 15de57606cSSage Weil #include "types.h" 16de57606cSSage Weil #include "messenger.h" 17de57606cSSage Weil #include "msgpool.h" 18de57606cSSage Weil #include "mon_client.h" 19de57606cSSage Weil #include "mds_client.h" 20de57606cSSage Weil #include "osd_client.h" 21de57606cSSage Weil #include "ceph_fs.h" 22de57606cSSage Weil 23de57606cSSage Weil /* f_type in struct statfs */ 24de57606cSSage Weil #define CEPH_SUPER_MAGIC 0x00c36400 25de57606cSSage Weil 26de57606cSSage Weil /* large granularity for statfs utilization stats to facilitate 27de57606cSSage Weil * large volume sizes on 32-bit machines. */ 28de57606cSSage Weil #define CEPH_BLOCK_SHIFT 20 /* 1 MB */ 29de57606cSSage Weil #define CEPH_BLOCK (1 << CEPH_BLOCK_SHIFT) 30de57606cSSage Weil 31de57606cSSage Weil /* 32de57606cSSage Weil * mount options 33de57606cSSage Weil */ 34de57606cSSage Weil #define CEPH_OPT_FSID (1<<0) 35de57606cSSage Weil #define CEPH_OPT_NOSHARE (1<<1) /* don't share client with other sbs */ 36de57606cSSage Weil #define CEPH_OPT_MYIP (1<<2) /* specified my ip */ 37de57606cSSage Weil #define CEPH_OPT_DIRSTAT (1<<4) /* funky `cat dirname` for stats */ 38de57606cSSage Weil #define CEPH_OPT_RBYTES (1<<5) /* dir st_bytes = rbytes */ 39de57606cSSage Weil #define CEPH_OPT_NOCRC (1<<6) /* no data crc on writes */ 40de57606cSSage Weil #define CEPH_OPT_NOASYNCREADDIR (1<<7) /* no dcache readdir */ 41de57606cSSage Weil 42de57606cSSage Weil #define CEPH_OPT_DEFAULT (CEPH_OPT_RBYTES) 43de57606cSSage Weil 44de57606cSSage Weil #define ceph_set_opt(client, opt) \ 456b805185SSage Weil (client)->mount_args->flags |= CEPH_OPT_##opt; 46de57606cSSage Weil #define ceph_test_opt(client, opt) \ 476b805185SSage Weil (!!((client)->mount_args->flags & CEPH_OPT_##opt)) 48de57606cSSage Weil 49de57606cSSage Weil 50de57606cSSage Weil struct ceph_mount_args { 51de57606cSSage Weil int sb_flags; 526b805185SSage Weil int num_mon; 536b805185SSage Weil struct ceph_entity_addr *mon_addr; 54de57606cSSage Weil int flags; 55de57606cSSage Weil int mount_timeout; 56f5a2041bSYehuda Sadeh int osd_idle_ttl; 57de57606cSSage Weil int caps_wanted_delay_min, caps_wanted_delay_max; 58de57606cSSage Weil struct ceph_fsid fsid; 59de57606cSSage Weil struct ceph_entity_addr my_addr; 60de57606cSSage Weil int wsize; 61de57606cSSage Weil int rsize; /* max readahead */ 62de57606cSSage Weil int max_readdir; /* max readdir size */ 632baba250SYehuda Sadeh int congestion_kb; /* max readdir size */ 64de57606cSSage Weil int osd_timeout; 65de57606cSSage Weil char *snapdir_name; /* default ".snap" */ 664e7a5dcdSSage Weil char *name; 67de57606cSSage Weil char *secret; 68de57606cSSage Weil int cap_release_safety; 69de57606cSSage Weil }; 70de57606cSSage Weil 71de57606cSSage Weil /* 72de57606cSSage Weil * defaults 73de57606cSSage Weil */ 74de57606cSSage Weil #define CEPH_MOUNT_TIMEOUT_DEFAULT 60 75f5a2041bSYehuda Sadeh #define CEPH_OSD_IDLE_TTL_DEFAULT 60 768fa97655SSage Weil #define CEPH_MOUNT_RSIZE_DEFAULT (512*1024) /* readahead */ 77de57606cSSage Weil 78de57606cSSage Weil #define CEPH_MSG_MAX_FRONT_LEN (16*1024*1024) 79de57606cSSage Weil #define CEPH_MSG_MAX_DATA_LEN (16*1024*1024) 80de57606cSSage Weil 81de57606cSSage Weil #define CEPH_SNAPDIRNAME_DEFAULT ".snap" 824e7a5dcdSSage Weil #define CEPH_AUTH_NAME_DEFAULT "guest" 83de57606cSSage Weil 84de57606cSSage Weil /* 85de57606cSSage Weil * Delay telling the MDS we no longer want caps, in case we reopen 86de57606cSSage Weil * the file. Delay a minimum amount of time, even if we send a cap 87de57606cSSage Weil * message for some other reason. Otherwise, take the oppotunity to 88de57606cSSage Weil * update the mds to avoid sending another message later. 89de57606cSSage Weil */ 90de57606cSSage Weil #define CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT 5 /* cap release delay */ 91de57606cSSage Weil #define CEPH_CAPS_WANTED_DELAY_MAX_DEFAULT 60 /* cap release delay */ 92de57606cSSage Weil 93de57606cSSage Weil 94de57606cSSage Weil /* mount state */ 95de57606cSSage Weil enum { 96de57606cSSage Weil CEPH_MOUNT_MOUNTING, 97de57606cSSage Weil CEPH_MOUNT_MOUNTED, 98de57606cSSage Weil CEPH_MOUNT_UNMOUNTING, 99de57606cSSage Weil CEPH_MOUNT_UNMOUNTED, 100de57606cSSage Weil CEPH_MOUNT_SHUTDOWN, 101de57606cSSage Weil }; 102de57606cSSage Weil 103de57606cSSage Weil /* 104de57606cSSage Weil * subtract jiffies 105de57606cSSage Weil */ 106de57606cSSage Weil static inline unsigned long time_sub(unsigned long a, unsigned long b) 107de57606cSSage Weil { 108de57606cSSage Weil BUG_ON(time_after(b, a)); 109de57606cSSage Weil return (long)a - (long)b; 110de57606cSSage Weil } 111de57606cSSage Weil 112de57606cSSage Weil /* 113de57606cSSage Weil * per-filesystem client state 114de57606cSSage Weil * 115de57606cSSage Weil * possibly shared by multiple mount points, if they are 116de57606cSSage Weil * mounting the same ceph filesystem/cluster. 117de57606cSSage Weil */ 118de57606cSSage Weil struct ceph_client { 1190743304dSSage Weil struct ceph_fsid fsid; 1200743304dSSage Weil bool have_fsid; 121de57606cSSage Weil 122de57606cSSage Weil struct mutex mount_mutex; /* serialize mount attempts */ 1236b805185SSage Weil struct ceph_mount_args *mount_args; 124de57606cSSage Weil 125de57606cSSage Weil struct super_block *sb; 126de57606cSSage Weil 127de57606cSSage Weil unsigned long mount_state; 1289bd2e6f8SSage Weil wait_queue_head_t auth_wq; 129de57606cSSage Weil 1309bd2e6f8SSage Weil int auth_err; 131de57606cSSage Weil 13285ccce43SSage Weil int min_caps; /* min caps i added */ 13385ccce43SSage Weil 134de57606cSSage Weil struct ceph_messenger *msgr; /* messenger instance */ 135de57606cSSage Weil struct ceph_mon_client monc; 136de57606cSSage Weil struct ceph_mds_client mdsc; 137de57606cSSage Weil struct ceph_osd_client osdc; 138de57606cSSage Weil 139de57606cSSage Weil /* writeback */ 140de57606cSSage Weil mempool_t *wb_pagevec_pool; 141de57606cSSage Weil struct workqueue_struct *wb_wq; 142de57606cSSage Weil struct workqueue_struct *pg_inv_wq; 143de57606cSSage Weil struct workqueue_struct *trunc_wq; 1442baba250SYehuda Sadeh atomic_long_t writeback_count; 145de57606cSSage Weil 146de57606cSSage Weil struct backing_dev_info backing_dev_info; 1470743304dSSage Weil 1480743304dSSage Weil #ifdef CONFIG_DEBUG_FS 1490743304dSSage Weil struct dentry *debugfs_monmap; 1500743304dSSage Weil struct dentry *debugfs_mdsmap, *debugfs_osdmap; 1510743304dSSage Weil struct dentry *debugfs_dir, *debugfs_dentry_lru, *debugfs_caps; 1522baba250SYehuda Sadeh struct dentry *debugfs_congestion_kb; 15306edf046SSage Weil struct dentry *debugfs_bdi; 1540743304dSSage Weil #endif 155de57606cSSage Weil }; 156de57606cSSage Weil 157de57606cSSage Weil static inline struct ceph_client *ceph_client(struct super_block *sb) 158de57606cSSage Weil { 159de57606cSSage Weil return sb->s_fs_info; 160de57606cSSage Weil } 161de57606cSSage Weil 162de57606cSSage Weil 163de57606cSSage Weil /* 164de57606cSSage Weil * File i/o capability. This tracks shared state with the metadata 165de57606cSSage Weil * server that allows us to cache or writeback attributes or to read 166de57606cSSage Weil * and write data. For any given inode, we should have one or more 167de57606cSSage Weil * capabilities, one issued by each metadata server, and our 168de57606cSSage Weil * cumulative access is the OR of all issued capabilities. 169de57606cSSage Weil * 170de57606cSSage Weil * Each cap is referenced by the inode's i_caps rbtree and by per-mds 171de57606cSSage Weil * session capability lists. 172de57606cSSage Weil */ 173de57606cSSage Weil struct ceph_cap { 174de57606cSSage Weil struct ceph_inode_info *ci; 175de57606cSSage Weil struct rb_node ci_node; /* per-ci cap tree */ 176de57606cSSage Weil struct ceph_mds_session *session; 177de57606cSSage Weil struct list_head session_caps; /* per-session caplist */ 178de57606cSSage Weil int mds; 179de57606cSSage Weil u64 cap_id; /* unique cap id (mds provided) */ 180de57606cSSage Weil int issued; /* latest, from the mds */ 181de57606cSSage Weil int implemented; /* implemented superset of issued (for revocation) */ 182de57606cSSage Weil int mds_wanted; 183685f9a5dSSage Weil u32 seq, issue_seq, mseq; 184685f9a5dSSage Weil u32 cap_gen; /* active/stale cycle */ 185de57606cSSage Weil unsigned long last_used; 186de57606cSSage Weil struct list_head caps_item; 187de57606cSSage Weil }; 188de57606cSSage Weil 189de57606cSSage Weil #define CHECK_CAPS_NODELAY 1 /* do not delay any further */ 190de57606cSSage Weil #define CHECK_CAPS_AUTHONLY 2 /* only check auth cap */ 191de57606cSSage Weil #define CHECK_CAPS_FLUSH 4 /* flush any dirty caps */ 192de57606cSSage Weil 193de57606cSSage Weil /* 194de57606cSSage Weil * Snapped cap state that is pending flush to mds. When a snapshot occurs, 195de57606cSSage Weil * we first complete any in-process sync writes and writeback any dirty 196de57606cSSage Weil * data before flushing the snapped state (tracked here) back to the MDS. 197de57606cSSage Weil */ 198de57606cSSage Weil struct ceph_cap_snap { 199de57606cSSage Weil atomic_t nref; 200de57606cSSage Weil struct ceph_inode_info *ci; 201de57606cSSage Weil struct list_head ci_item, flushing_item; 202de57606cSSage Weil 203de57606cSSage Weil u64 follows, flush_tid; 204de57606cSSage Weil int issued, dirty; 205de57606cSSage Weil struct ceph_snap_context *context; 206de57606cSSage Weil 207de57606cSSage Weil mode_t mode; 208de57606cSSage Weil uid_t uid; 209de57606cSSage Weil gid_t gid; 210de57606cSSage Weil 211de57606cSSage Weil void *xattr_blob; 212de57606cSSage Weil int xattr_len; 213de57606cSSage Weil u64 xattr_version; 214de57606cSSage Weil 215de57606cSSage Weil u64 size; 216de57606cSSage Weil struct timespec mtime, atime, ctime; 217de57606cSSage Weil u64 time_warp_seq; 218de57606cSSage Weil int writing; /* a sync write is still in progress */ 219de57606cSSage Weil int dirty_pages; /* dirty pages awaiting writeback */ 220de57606cSSage Weil }; 221de57606cSSage Weil 222de57606cSSage Weil static inline void ceph_put_cap_snap(struct ceph_cap_snap *capsnap) 223de57606cSSage Weil { 224de57606cSSage Weil if (atomic_dec_and_test(&capsnap->nref)) 225de57606cSSage Weil kfree(capsnap); 226de57606cSSage Weil } 227de57606cSSage Weil 228de57606cSSage Weil /* 229de57606cSSage Weil * The frag tree describes how a directory is fragmented, potentially across 230de57606cSSage Weil * multiple metadata servers. It is also used to indicate points where 231de57606cSSage Weil * metadata authority is delegated, and whether/where metadata is replicated. 232de57606cSSage Weil * 233de57606cSSage Weil * A _leaf_ frag will be present in the i_fragtree IFF there is 234de57606cSSage Weil * delegation info. That is, if mds >= 0 || ndist > 0. 235de57606cSSage Weil */ 236de57606cSSage Weil #define CEPH_MAX_DIRFRAG_REP 4 237de57606cSSage Weil 238de57606cSSage Weil struct ceph_inode_frag { 239de57606cSSage Weil struct rb_node node; 240de57606cSSage Weil 241de57606cSSage Weil /* fragtree state */ 242de57606cSSage Weil u32 frag; 243de57606cSSage Weil int split_by; /* i.e. 2^(split_by) children */ 244de57606cSSage Weil 245de57606cSSage Weil /* delegation and replication info */ 246de57606cSSage Weil int mds; /* -1 if same authority as parent */ 247de57606cSSage Weil int ndist; /* >0 if replicated */ 248de57606cSSage Weil int dist[CEPH_MAX_DIRFRAG_REP]; 249de57606cSSage Weil }; 250de57606cSSage Weil 251de57606cSSage Weil /* 252de57606cSSage Weil * We cache inode xattrs as an encoded blob until they are first used, 253de57606cSSage Weil * at which point we parse them into an rbtree. 254de57606cSSage Weil */ 255de57606cSSage Weil struct ceph_inode_xattr { 256de57606cSSage Weil struct rb_node node; 257de57606cSSage Weil 258de57606cSSage Weil const char *name; 259de57606cSSage Weil int name_len; 260de57606cSSage Weil const char *val; 261de57606cSSage Weil int val_len; 262de57606cSSage Weil int dirty; 263de57606cSSage Weil 264de57606cSSage Weil int should_free_name; 265de57606cSSage Weil int should_free_val; 266de57606cSSage Weil }; 267de57606cSSage Weil 268de57606cSSage Weil struct ceph_inode_xattrs_info { 269de57606cSSage Weil /* 270de57606cSSage Weil * (still encoded) xattr blob. we avoid the overhead of parsing 271de57606cSSage Weil * this until someone actually calls getxattr, etc. 272de57606cSSage Weil * 273de57606cSSage Weil * blob->vec.iov_len == 4 implies there are no xattrs; blob == 274de57606cSSage Weil * NULL means we don't know. 275de57606cSSage Weil */ 276de57606cSSage Weil struct ceph_buffer *blob, *prealloc_blob; 277de57606cSSage Weil 278de57606cSSage Weil struct rb_root index; 279de57606cSSage Weil bool dirty; 280de57606cSSage Weil int count; 281de57606cSSage Weil int names_size; 282de57606cSSage Weil int vals_size; 283de57606cSSage Weil u64 version, index_version; 284de57606cSSage Weil }; 285de57606cSSage Weil 286de57606cSSage Weil /* 287de57606cSSage Weil * Ceph inode. 288de57606cSSage Weil */ 289de57606cSSage Weil #define CEPH_I_COMPLETE 1 /* we have complete directory cached */ 290de57606cSSage Weil #define CEPH_I_NODELAY 4 /* do not delay cap release */ 291de57606cSSage Weil #define CEPH_I_FLUSH 8 /* do not delay flush of dirty metadata */ 292*e9964c10SSage Weil #define CEPH_I_NOFLUSH 16 /* do not flush dirty caps */ 293de57606cSSage Weil 294de57606cSSage Weil struct ceph_inode_info { 295de57606cSSage Weil struct ceph_vino i_vino; /* ceph ino + snap */ 296de57606cSSage Weil 297de57606cSSage Weil u64 i_version; 298de57606cSSage Weil u32 i_time_warp_seq; 299de57606cSSage Weil 300de57606cSSage Weil unsigned i_ceph_flags; 301de57606cSSage Weil unsigned long i_release_count; 302de57606cSSage Weil 303de57606cSSage Weil struct ceph_file_layout i_layout; 304de57606cSSage Weil char *i_symlink; 305de57606cSSage Weil 306de57606cSSage Weil /* for dirs */ 307de57606cSSage Weil struct timespec i_rctime; 308de57606cSSage Weil u64 i_rbytes, i_rfiles, i_rsubdirs; 309de57606cSSage Weil u64 i_files, i_subdirs; 310de57606cSSage Weil u64 i_max_offset; /* largest readdir offset, set with I_COMPLETE */ 311de57606cSSage Weil 312de57606cSSage Weil struct rb_root i_fragtree; 313de57606cSSage Weil struct mutex i_fragtree_mutex; 314de57606cSSage Weil 315de57606cSSage Weil struct ceph_inode_xattrs_info i_xattrs; 316de57606cSSage Weil 317de57606cSSage Weil /* capabilities. protected _both_ by i_lock and cap->session's 318de57606cSSage Weil * s_mutex. */ 319de57606cSSage Weil struct rb_root i_caps; /* cap list */ 320de57606cSSage Weil struct ceph_cap *i_auth_cap; /* authoritative cap, if any */ 321de57606cSSage Weil unsigned i_dirty_caps, i_flushing_caps; /* mask of dirtied fields */ 322de57606cSSage Weil struct list_head i_dirty_item, i_flushing_item; 323de57606cSSage Weil u64 i_cap_flush_seq; 324de57606cSSage Weil /* we need to track cap writeback on a per-cap-bit basis, to allow 325de57606cSSage Weil * overlapping, pipelined cap flushes to the mds. we can probably 326de57606cSSage Weil * reduce the tid to 8 bits if we're concerned about inode size. */ 327de57606cSSage Weil u16 i_cap_flush_last_tid, i_cap_flush_tid[CEPH_CAP_BITS]; 328de57606cSSage Weil wait_queue_head_t i_cap_wq; /* threads waiting on a capability */ 329de57606cSSage Weil unsigned long i_hold_caps_min; /* jiffies */ 330de57606cSSage Weil unsigned long i_hold_caps_max; /* jiffies */ 331de57606cSSage Weil struct list_head i_cap_delay_list; /* for delayed cap release to mds */ 332de57606cSSage Weil int i_cap_exporting_mds; /* to handle cap migration between */ 333de57606cSSage Weil unsigned i_cap_exporting_mseq; /* mds's. */ 334de57606cSSage Weil unsigned i_cap_exporting_issued; 335de57606cSSage Weil struct ceph_cap_reservation i_cap_migration_resv; 336de57606cSSage Weil struct list_head i_cap_snaps; /* snapped state pending flush to mds */ 337de57606cSSage Weil struct ceph_snap_context *i_head_snapc; /* set if wr_buffer_head > 0 */ 338de57606cSSage Weil unsigned i_snap_caps; /* cap bits for snapped files */ 339de57606cSSage Weil 340de57606cSSage Weil int i_nr_by_mode[CEPH_FILE_MODE_NUM]; /* open file counts */ 341de57606cSSage Weil 342de57606cSSage Weil u32 i_truncate_seq; /* last truncate to smaller size */ 343de57606cSSage Weil u64 i_truncate_size; /* and the size we last truncated down to */ 344de57606cSSage Weil int i_truncate_pending; /* still need to call vmtruncate */ 345de57606cSSage Weil 346de57606cSSage Weil u64 i_max_size; /* max file size authorized by mds */ 347de57606cSSage Weil u64 i_reported_size; /* (max_)size reported to or requested of mds */ 348de57606cSSage Weil u64 i_wanted_max_size; /* offset we'd like to write too */ 349de57606cSSage Weil u64 i_requested_max_size; /* max_size we've requested */ 350de57606cSSage Weil 351de57606cSSage Weil /* held references to caps */ 352de57606cSSage Weil int i_pin_ref; 353de57606cSSage Weil int i_rd_ref, i_rdcache_ref, i_wr_ref; 354de57606cSSage Weil int i_wrbuffer_ref, i_wrbuffer_ref_head; 355de57606cSSage Weil u32 i_shared_gen; /* increment each time we get FILE_SHARED */ 356de57606cSSage Weil u32 i_rdcache_gen; /* we increment this each time we get 357de57606cSSage Weil FILE_CACHE. If it's non-zero, we 358de57606cSSage Weil _may_ have cached pages. */ 359de57606cSSage Weil u32 i_rdcache_revoking; /* RDCACHE gen to async invalidate, if any */ 360de57606cSSage Weil 361de57606cSSage Weil struct list_head i_unsafe_writes; /* uncommitted sync writes */ 362de57606cSSage Weil struct list_head i_unsafe_dirops; /* uncommitted mds dir ops */ 363de57606cSSage Weil spinlock_t i_unsafe_lock; 364de57606cSSage Weil 365de57606cSSage Weil struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */ 366de57606cSSage Weil int i_snap_realm_counter; /* snap realm (if caps) */ 367de57606cSSage Weil struct list_head i_snap_realm_item; 368de57606cSSage Weil struct list_head i_snap_flush_item; 369de57606cSSage Weil 370de57606cSSage Weil struct work_struct i_wb_work; /* writeback work */ 371de57606cSSage Weil struct work_struct i_pg_inv_work; /* page invalidation work */ 372de57606cSSage Weil 373de57606cSSage Weil struct work_struct i_vmtruncate_work; 374de57606cSSage Weil 375de57606cSSage Weil struct inode vfs_inode; /* at end */ 376de57606cSSage Weil }; 377de57606cSSage Weil 378de57606cSSage Weil static inline struct ceph_inode_info *ceph_inode(struct inode *inode) 379de57606cSSage Weil { 380fbbccec9SNoah Watkins return container_of(inode, struct ceph_inode_info, vfs_inode); 381de57606cSSage Weil } 382de57606cSSage Weil 383de57606cSSage Weil static inline void ceph_i_clear(struct inode *inode, unsigned mask) 384de57606cSSage Weil { 385de57606cSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 386de57606cSSage Weil 387de57606cSSage Weil spin_lock(&inode->i_lock); 388de57606cSSage Weil ci->i_ceph_flags &= ~mask; 389de57606cSSage Weil spin_unlock(&inode->i_lock); 390de57606cSSage Weil } 391de57606cSSage Weil 392de57606cSSage Weil static inline void ceph_i_set(struct inode *inode, unsigned mask) 393de57606cSSage Weil { 394de57606cSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 395de57606cSSage Weil 396de57606cSSage Weil spin_lock(&inode->i_lock); 397de57606cSSage Weil ci->i_ceph_flags |= mask; 398de57606cSSage Weil spin_unlock(&inode->i_lock); 399de57606cSSage Weil } 400de57606cSSage Weil 401de57606cSSage Weil static inline bool ceph_i_test(struct inode *inode, unsigned mask) 402de57606cSSage Weil { 403de57606cSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 404de57606cSSage Weil bool r; 405de57606cSSage Weil 406de57606cSSage Weil smp_mb(); 407de57606cSSage Weil r = (ci->i_ceph_flags & mask) == mask; 408de57606cSSage Weil return r; 409de57606cSSage Weil } 410de57606cSSage Weil 411de57606cSSage Weil 412de57606cSSage Weil /* find a specific frag @f */ 413de57606cSSage Weil extern struct ceph_inode_frag *__ceph_find_frag(struct ceph_inode_info *ci, 414de57606cSSage Weil u32 f); 415de57606cSSage Weil 416de57606cSSage Weil /* 417de57606cSSage Weil * choose fragment for value @v. copy frag content to pfrag, if leaf 418de57606cSSage Weil * exists 419de57606cSSage Weil */ 420de57606cSSage Weil extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v, 421de57606cSSage Weil struct ceph_inode_frag *pfrag, 422de57606cSSage Weil int *found); 423de57606cSSage Weil 424de57606cSSage Weil /* 425de57606cSSage Weil * Ceph dentry state 426de57606cSSage Weil */ 427de57606cSSage Weil struct ceph_dentry_info { 428de57606cSSage Weil struct ceph_mds_session *lease_session; 429de57606cSSage Weil u32 lease_gen, lease_shared_gen; 430de57606cSSage Weil u32 lease_seq; 431de57606cSSage Weil unsigned long lease_renew_after, lease_renew_from; 432de57606cSSage Weil struct list_head lru; 433de57606cSSage Weil struct dentry *dentry; 434de57606cSSage Weil u64 time; 435de57606cSSage Weil u64 offset; 436de57606cSSage Weil }; 437de57606cSSage Weil 438de57606cSSage Weil static inline struct ceph_dentry_info *ceph_dentry(struct dentry *dentry) 439de57606cSSage Weil { 440de57606cSSage Weil return (struct ceph_dentry_info *)dentry->d_fsdata; 441de57606cSSage Weil } 442de57606cSSage Weil 443de57606cSSage Weil static inline loff_t ceph_make_fpos(unsigned frag, unsigned off) 444de57606cSSage Weil { 445de57606cSSage Weil return ((loff_t)frag << 32) | (loff_t)off; 446de57606cSSage Weil } 447de57606cSSage Weil 448de57606cSSage Weil /* 449de57606cSSage Weil * ino_t is <64 bits on many architectures, blech. 450de57606cSSage Weil * 451de57606cSSage Weil * don't include snap in ino hash, at least for now. 452de57606cSSage Weil */ 453de57606cSSage Weil static inline ino_t ceph_vino_to_ino(struct ceph_vino vino) 454de57606cSSage Weil { 455de57606cSSage Weil ino_t ino = (ino_t)vino.ino; /* ^ (vino.snap << 20); */ 456de57606cSSage Weil #if BITS_PER_LONG == 32 457de57606cSSage Weil ino ^= vino.ino >> (sizeof(u64)-sizeof(ino_t)) * 8; 458de57606cSSage Weil if (!ino) 459de57606cSSage Weil ino = 1; 460de57606cSSage Weil #endif 461de57606cSSage Weil return ino; 462de57606cSSage Weil } 463de57606cSSage Weil 464de57606cSSage Weil static inline int ceph_set_ino_cb(struct inode *inode, void *data) 465de57606cSSage Weil { 466de57606cSSage Weil ceph_inode(inode)->i_vino = *(struct ceph_vino *)data; 467de57606cSSage Weil inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data); 468de57606cSSage Weil return 0; 469de57606cSSage Weil } 470de57606cSSage Weil 471de57606cSSage Weil static inline struct ceph_vino ceph_vino(struct inode *inode) 472de57606cSSage Weil { 473de57606cSSage Weil return ceph_inode(inode)->i_vino; 474de57606cSSage Weil } 475de57606cSSage Weil 476de57606cSSage Weil /* for printf-style formatting */ 477de57606cSSage Weil #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap 478de57606cSSage Weil 479de57606cSSage Weil static inline u64 ceph_ino(struct inode *inode) 480de57606cSSage Weil { 481de57606cSSage Weil return ceph_inode(inode)->i_vino.ino; 482de57606cSSage Weil } 483de57606cSSage Weil static inline u64 ceph_snap(struct inode *inode) 484de57606cSSage Weil { 485de57606cSSage Weil return ceph_inode(inode)->i_vino.snap; 486de57606cSSage Weil } 487de57606cSSage Weil 488de57606cSSage Weil static inline int ceph_ino_compare(struct inode *inode, void *data) 489de57606cSSage Weil { 490de57606cSSage Weil struct ceph_vino *pvino = (struct ceph_vino *)data; 491de57606cSSage Weil struct ceph_inode_info *ci = ceph_inode(inode); 492de57606cSSage Weil return ci->i_vino.ino == pvino->ino && 493de57606cSSage Weil ci->i_vino.snap == pvino->snap; 494de57606cSSage Weil } 495de57606cSSage Weil 496de57606cSSage Weil static inline struct inode *ceph_find_inode(struct super_block *sb, 497de57606cSSage Weil struct ceph_vino vino) 498de57606cSSage Weil { 499de57606cSSage Weil ino_t t = ceph_vino_to_ino(vino); 500de57606cSSage Weil return ilookup5(sb, t, ceph_ino_compare, &vino); 501de57606cSSage Weil } 502de57606cSSage Weil 503de57606cSSage Weil 504de57606cSSage Weil /* 505de57606cSSage Weil * caps helpers 506de57606cSSage Weil */ 507de57606cSSage Weil static inline bool __ceph_is_any_real_caps(struct ceph_inode_info *ci) 508de57606cSSage Weil { 509de57606cSSage Weil return !RB_EMPTY_ROOT(&ci->i_caps); 510de57606cSSage Weil } 511de57606cSSage Weil 512de57606cSSage Weil extern int __ceph_caps_issued(struct ceph_inode_info *ci, int *implemented); 513de57606cSSage Weil extern int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int t); 514de57606cSSage Weil extern int __ceph_caps_issued_other(struct ceph_inode_info *ci, 515de57606cSSage Weil struct ceph_cap *cap); 516de57606cSSage Weil 517de57606cSSage Weil static inline int ceph_caps_issued(struct ceph_inode_info *ci) 518de57606cSSage Weil { 519de57606cSSage Weil int issued; 520de57606cSSage Weil spin_lock(&ci->vfs_inode.i_lock); 521de57606cSSage Weil issued = __ceph_caps_issued(ci, NULL); 522de57606cSSage Weil spin_unlock(&ci->vfs_inode.i_lock); 523de57606cSSage Weil return issued; 524de57606cSSage Weil } 525de57606cSSage Weil 526de57606cSSage Weil static inline int ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, 527de57606cSSage Weil int touch) 528de57606cSSage Weil { 529de57606cSSage Weil int r; 530de57606cSSage Weil spin_lock(&ci->vfs_inode.i_lock); 531de57606cSSage Weil r = __ceph_caps_issued_mask(ci, mask, touch); 532de57606cSSage Weil spin_unlock(&ci->vfs_inode.i_lock); 533de57606cSSage Weil return r; 534de57606cSSage Weil } 535de57606cSSage Weil 536de57606cSSage Weil static inline int __ceph_caps_dirty(struct ceph_inode_info *ci) 537de57606cSSage Weil { 538de57606cSSage Weil return ci->i_dirty_caps | ci->i_flushing_caps; 539de57606cSSage Weil } 540afcdaea3SSage Weil extern void __ceph_mark_dirty_caps(struct ceph_inode_info *ci, int mask); 541de57606cSSage Weil 542de57606cSSage Weil extern int ceph_caps_revoking(struct ceph_inode_info *ci, int mask); 543de57606cSSage Weil extern int __ceph_caps_used(struct ceph_inode_info *ci); 544de57606cSSage Weil 545de57606cSSage Weil extern int __ceph_caps_file_wanted(struct ceph_inode_info *ci); 546de57606cSSage Weil 547de57606cSSage Weil /* 548de57606cSSage Weil * wanted, by virtue of open file modes AND cap refs (buffered/cached data) 549de57606cSSage Weil */ 550de57606cSSage Weil static inline int __ceph_caps_wanted(struct ceph_inode_info *ci) 551de57606cSSage Weil { 552de57606cSSage Weil int w = __ceph_caps_file_wanted(ci) | __ceph_caps_used(ci); 553de57606cSSage Weil if (w & CEPH_CAP_FILE_BUFFER) 554de57606cSSage Weil w |= CEPH_CAP_FILE_EXCL; /* we want EXCL if dirty data */ 555de57606cSSage Weil return w; 556de57606cSSage Weil } 557de57606cSSage Weil 558de57606cSSage Weil /* what the mds thinks we want */ 559de57606cSSage Weil extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci); 560de57606cSSage Weil 561de57606cSSage Weil extern void ceph_caps_init(void); 562de57606cSSage Weil extern void ceph_caps_finalize(void); 56385ccce43SSage Weil extern void ceph_adjust_min_caps(int delta); 564de57606cSSage Weil extern int ceph_reserve_caps(struct ceph_cap_reservation *ctx, int need); 565de57606cSSage Weil extern int ceph_unreserve_caps(struct ceph_cap_reservation *ctx); 566de57606cSSage Weil extern void ceph_reservation_status(struct ceph_client *client, 567de57606cSSage Weil int *total, int *avail, int *used, 56885ccce43SSage Weil int *reserved, int *min); 569de57606cSSage Weil 570de57606cSSage Weil static inline struct ceph_client *ceph_inode_to_client(struct inode *inode) 571de57606cSSage Weil { 572de57606cSSage Weil return (struct ceph_client *)inode->i_sb->s_fs_info; 573de57606cSSage Weil } 574de57606cSSage Weil 575de57606cSSage Weil static inline struct ceph_client *ceph_sb_to_client(struct super_block *sb) 576de57606cSSage Weil { 577de57606cSSage Weil return (struct ceph_client *)sb->s_fs_info; 578de57606cSSage Weil } 579de57606cSSage Weil 580de57606cSSage Weil 581de57606cSSage Weil /* 582de57606cSSage Weil * we keep buffered readdir results attached to file->private_data 583de57606cSSage Weil */ 584de57606cSSage Weil struct ceph_file_info { 585de57606cSSage Weil int fmode; /* initialized on open */ 586de57606cSSage Weil 587de57606cSSage Weil /* readdir: position within the dir */ 588de57606cSSage Weil u32 frag; 589de57606cSSage Weil struct ceph_mds_request *last_readdir; 590de57606cSSage Weil int at_end; 591de57606cSSage Weil 592de57606cSSage Weil /* readdir: position within a frag */ 593de57606cSSage Weil unsigned offset; /* offset of last chunk, adjusted for . and .. */ 594de57606cSSage Weil u64 next_offset; /* offset of next chunk (last_name's + 1) */ 595de57606cSSage Weil char *last_name; /* last entry in previous chunk */ 596de57606cSSage Weil struct dentry *dentry; /* next dentry (for dcache readdir) */ 597de57606cSSage Weil unsigned long dir_release_count; 598de57606cSSage Weil 599de57606cSSage Weil /* used for -o dirstat read() on directory thing */ 600de57606cSSage Weil char *dir_info; 601de57606cSSage Weil int dir_info_len; 602de57606cSSage Weil }; 603de57606cSSage Weil 604de57606cSSage Weil 605de57606cSSage Weil 606de57606cSSage Weil /* 607de57606cSSage Weil * snapshots 608de57606cSSage Weil */ 609de57606cSSage Weil 610de57606cSSage Weil /* 611de57606cSSage Weil * A "snap context" is the set of existing snapshots when we 612de57606cSSage Weil * write data. It is used by the OSD to guide its COW behavior. 613de57606cSSage Weil * 614de57606cSSage Weil * The ceph_snap_context is refcounted, and attached to each dirty 615de57606cSSage Weil * page, indicating which context the dirty data belonged when it was 616de57606cSSage Weil * dirtied. 617de57606cSSage Weil */ 618de57606cSSage Weil struct ceph_snap_context { 619de57606cSSage Weil atomic_t nref; 620de57606cSSage Weil u64 seq; 621de57606cSSage Weil int num_snaps; 622de57606cSSage Weil u64 snaps[]; 623de57606cSSage Weil }; 624de57606cSSage Weil 625de57606cSSage Weil static inline struct ceph_snap_context * 626de57606cSSage Weil ceph_get_snap_context(struct ceph_snap_context *sc) 627de57606cSSage Weil { 628de57606cSSage Weil /* 629de57606cSSage Weil printk("get_snap_context %p %d -> %d\n", sc, atomic_read(&sc->nref), 630de57606cSSage Weil atomic_read(&sc->nref)+1); 631de57606cSSage Weil */ 632de57606cSSage Weil if (sc) 633de57606cSSage Weil atomic_inc(&sc->nref); 634de57606cSSage Weil return sc; 635de57606cSSage Weil } 636de57606cSSage Weil 637de57606cSSage Weil static inline void ceph_put_snap_context(struct ceph_snap_context *sc) 638de57606cSSage Weil { 639de57606cSSage Weil if (!sc) 640de57606cSSage Weil return; 641de57606cSSage Weil /* 642de57606cSSage Weil printk("put_snap_context %p %d -> %d\n", sc, atomic_read(&sc->nref), 643de57606cSSage Weil atomic_read(&sc->nref)-1); 644de57606cSSage Weil */ 645de57606cSSage Weil if (atomic_dec_and_test(&sc->nref)) { 646de57606cSSage Weil /*printk(" deleting snap_context %p\n", sc);*/ 647de57606cSSage Weil kfree(sc); 648de57606cSSage Weil } 649de57606cSSage Weil } 650de57606cSSage Weil 651de57606cSSage Weil /* 652de57606cSSage Weil * A "snap realm" describes a subset of the file hierarchy sharing 653de57606cSSage Weil * the same set of snapshots that apply to it. The realms themselves 654de57606cSSage Weil * are organized into a hierarchy, such that children inherit (some of) 655de57606cSSage Weil * the snapshots of their parents. 656de57606cSSage Weil * 657de57606cSSage Weil * All inodes within the realm that have capabilities are linked into a 658de57606cSSage Weil * per-realm list. 659de57606cSSage Weil */ 660de57606cSSage Weil struct ceph_snap_realm { 661de57606cSSage Weil u64 ino; 662de57606cSSage Weil atomic_t nref; 663a105f00cSSage Weil struct rb_node node; 664a105f00cSSage Weil 665de57606cSSage Weil u64 created, seq; 666de57606cSSage Weil u64 parent_ino; 667de57606cSSage Weil u64 parent_since; /* snapid when our current parent became so */ 668de57606cSSage Weil 669de57606cSSage Weil u64 *prior_parent_snaps; /* snaps inherited from any parents we */ 670de57606cSSage Weil int num_prior_parent_snaps; /* had prior to parent_since */ 671de57606cSSage Weil u64 *snaps; /* snaps specific to this realm */ 672de57606cSSage Weil int num_snaps; 673de57606cSSage Weil 674de57606cSSage Weil struct ceph_snap_realm *parent; 675de57606cSSage Weil struct list_head children; /* list of child realms */ 676de57606cSSage Weil struct list_head child_item; 677de57606cSSage Weil 678de57606cSSage Weil struct list_head empty_item; /* if i have ref==0 */ 679de57606cSSage Weil 680de57606cSSage Weil /* the current set of snaps for this realm */ 681de57606cSSage Weil struct ceph_snap_context *cached_context; 682de57606cSSage Weil 683de57606cSSage Weil struct list_head inodes_with_caps; 684de57606cSSage Weil spinlock_t inodes_with_caps_lock; 685de57606cSSage Weil }; 686de57606cSSage Weil 687de57606cSSage Weil 688de57606cSSage Weil 689de57606cSSage Weil /* 690de57606cSSage Weil * calculate the number of pages a given length and offset map onto, 691de57606cSSage Weil * if we align the data. 692de57606cSSage Weil */ 693de57606cSSage Weil static inline int calc_pages_for(u64 off, u64 len) 694de57606cSSage Weil { 695de57606cSSage Weil return ((off+len+PAGE_CACHE_SIZE-1) >> PAGE_CACHE_SHIFT) - 696de57606cSSage Weil (off >> PAGE_CACHE_SHIFT); 697de57606cSSage Weil } 698de57606cSSage Weil 699de57606cSSage Weil 700de57606cSSage Weil 701de57606cSSage Weil /* snap.c */ 702de57606cSSage Weil struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc, 703de57606cSSage Weil u64 ino); 704de57606cSSage Weil extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc, 705de57606cSSage Weil struct ceph_snap_realm *realm); 706de57606cSSage Weil extern void ceph_put_snap_realm(struct ceph_mds_client *mdsc, 707de57606cSSage Weil struct ceph_snap_realm *realm); 708de57606cSSage Weil extern int ceph_update_snap_trace(struct ceph_mds_client *m, 709de57606cSSage Weil void *p, void *e, bool deletion); 710de57606cSSage Weil extern void ceph_handle_snap(struct ceph_mds_client *mdsc, 7112600d2ddSSage Weil struct ceph_mds_session *session, 712de57606cSSage Weil struct ceph_msg *msg); 713de57606cSSage Weil extern void ceph_queue_cap_snap(struct ceph_inode_info *ci, 714de57606cSSage Weil struct ceph_snap_context *snapc); 715de57606cSSage Weil extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci, 716de57606cSSage Weil struct ceph_cap_snap *capsnap); 717de57606cSSage Weil extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc); 718de57606cSSage Weil 719de57606cSSage Weil /* 720de57606cSSage Weil * a cap_snap is "pending" if it is still awaiting an in-progress 721de57606cSSage Weil * sync write (that may/may not still update size, mtime, etc.). 722de57606cSSage Weil */ 723de57606cSSage Weil static inline bool __ceph_have_pending_cap_snap(struct ceph_inode_info *ci) 724de57606cSSage Weil { 725de57606cSSage Weil return !list_empty(&ci->i_cap_snaps) && 726de57606cSSage Weil list_entry(ci->i_cap_snaps.prev, struct ceph_cap_snap, 727de57606cSSage Weil ci_item)->writing; 728de57606cSSage Weil } 729de57606cSSage Weil 730de57606cSSage Weil 731de57606cSSage Weil /* super.c */ 732de57606cSSage Weil extern struct kmem_cache *ceph_inode_cachep; 733de57606cSSage Weil extern struct kmem_cache *ceph_cap_cachep; 734de57606cSSage Weil extern struct kmem_cache *ceph_dentry_cachep; 735de57606cSSage Weil extern struct kmem_cache *ceph_file_cachep; 736de57606cSSage Weil 737de57606cSSage Weil extern const char *ceph_msg_type_name(int type); 7380743304dSSage Weil extern int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid); 739de57606cSSage Weil 740de57606cSSage Weil #define FSID_FORMAT "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-" \ 741de57606cSSage Weil "%02x%02x%02x%02x%02x%02x" 742de57606cSSage Weil #define PR_FSID(f) (f)->fsid[0], (f)->fsid[1], (f)->fsid[2], (f)->fsid[3], \ 743de57606cSSage Weil (f)->fsid[4], (f)->fsid[5], (f)->fsid[6], (f)->fsid[7], \ 744de57606cSSage Weil (f)->fsid[8], (f)->fsid[9], (f)->fsid[10], (f)->fsid[11], \ 745de57606cSSage Weil (f)->fsid[12], (f)->fsid[13], (f)->fsid[14], (f)->fsid[15] 746de57606cSSage Weil 747de57606cSSage Weil /* inode.c */ 748de57606cSSage Weil extern const struct inode_operations ceph_file_iops; 749de57606cSSage Weil 750de57606cSSage Weil extern struct inode *ceph_alloc_inode(struct super_block *sb); 751de57606cSSage Weil extern void ceph_destroy_inode(struct inode *inode); 752de57606cSSage Weil 753de57606cSSage Weil extern struct inode *ceph_get_inode(struct super_block *sb, 754de57606cSSage Weil struct ceph_vino vino); 755de57606cSSage Weil extern struct inode *ceph_get_snapdir(struct inode *parent); 756de57606cSSage Weil extern int ceph_fill_file_size(struct inode *inode, int issued, 757de57606cSSage Weil u32 truncate_seq, u64 truncate_size, u64 size); 758de57606cSSage Weil extern void ceph_fill_file_time(struct inode *inode, int issued, 759de57606cSSage Weil u64 time_warp_seq, struct timespec *ctime, 760de57606cSSage Weil struct timespec *mtime, struct timespec *atime); 761de57606cSSage Weil extern int ceph_fill_trace(struct super_block *sb, 762de57606cSSage Weil struct ceph_mds_request *req, 763de57606cSSage Weil struct ceph_mds_session *session); 764de57606cSSage Weil extern int ceph_readdir_prepopulate(struct ceph_mds_request *req, 765de57606cSSage Weil struct ceph_mds_session *session); 766de57606cSSage Weil 767de57606cSSage Weil extern int ceph_inode_holds_cap(struct inode *inode, int mask); 768de57606cSSage Weil 769de57606cSSage Weil extern int ceph_inode_set_size(struct inode *inode, loff_t size); 770de57606cSSage Weil extern void __ceph_do_pending_vmtruncate(struct inode *inode); 7713c6f6b79SSage Weil extern void ceph_queue_vmtruncate(struct inode *inode); 7723c6f6b79SSage Weil 7733c6f6b79SSage Weil extern void ceph_queue_invalidate(struct inode *inode); 7743c6f6b79SSage Weil extern void ceph_queue_writeback(struct inode *inode); 775de57606cSSage Weil 776de57606cSSage Weil extern int ceph_do_getattr(struct inode *inode, int mask); 777de57606cSSage Weil extern int ceph_permission(struct inode *inode, int mask); 778de57606cSSage Weil extern int ceph_setattr(struct dentry *dentry, struct iattr *attr); 779de57606cSSage Weil extern int ceph_getattr(struct vfsmount *mnt, struct dentry *dentry, 780de57606cSSage Weil struct kstat *stat); 781de57606cSSage Weil 782de57606cSSage Weil /* xattr.c */ 783de57606cSSage Weil extern int ceph_setxattr(struct dentry *, const char *, const void *, 784de57606cSSage Weil size_t, int); 785de57606cSSage Weil extern ssize_t ceph_getxattr(struct dentry *, const char *, void *, size_t); 786de57606cSSage Weil extern ssize_t ceph_listxattr(struct dentry *, char *, size_t); 787de57606cSSage Weil extern int ceph_removexattr(struct dentry *, const char *); 788de57606cSSage Weil extern void __ceph_build_xattrs_blob(struct ceph_inode_info *ci); 789de57606cSSage Weil extern void __ceph_destroy_xattrs(struct ceph_inode_info *ci); 790de57606cSSage Weil 791de57606cSSage Weil /* caps.c */ 792de57606cSSage Weil extern const char *ceph_cap_string(int c); 793de57606cSSage Weil extern void ceph_handle_caps(struct ceph_mds_session *session, 794de57606cSSage Weil struct ceph_msg *msg); 795de57606cSSage Weil extern int ceph_add_cap(struct inode *inode, 796de57606cSSage Weil struct ceph_mds_session *session, u64 cap_id, 797de57606cSSage Weil int fmode, unsigned issued, unsigned wanted, 798de57606cSSage Weil unsigned cap, unsigned seq, u64 realmino, int flags, 799de57606cSSage Weil struct ceph_cap_reservation *caps_reservation); 8007c1332b8SSage Weil extern void __ceph_remove_cap(struct ceph_cap *cap); 801de57606cSSage Weil static inline void ceph_remove_cap(struct ceph_cap *cap) 802de57606cSSage Weil { 803de57606cSSage Weil struct inode *inode = &cap->ci->vfs_inode; 804de57606cSSage Weil spin_lock(&inode->i_lock); 8057c1332b8SSage Weil __ceph_remove_cap(cap); 806de57606cSSage Weil spin_unlock(&inode->i_lock); 807de57606cSSage Weil } 8087c1332b8SSage Weil extern void ceph_put_cap(struct ceph_cap *cap); 809de57606cSSage Weil 810de57606cSSage Weil extern void ceph_queue_caps_release(struct inode *inode); 811de57606cSSage Weil extern int ceph_write_inode(struct inode *inode, int unused); 812de57606cSSage Weil extern int ceph_fsync(struct file *file, struct dentry *dentry, int datasync); 813de57606cSSage Weil extern void ceph_kick_flushing_caps(struct ceph_mds_client *mdsc, 814de57606cSSage Weil struct ceph_mds_session *session); 815de57606cSSage Weil extern int ceph_get_cap_mds(struct inode *inode); 816de57606cSSage Weil extern void ceph_get_cap_refs(struct ceph_inode_info *ci, int caps); 817de57606cSSage Weil extern void ceph_put_cap_refs(struct ceph_inode_info *ci, int had); 818de57606cSSage Weil extern void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr, 819de57606cSSage Weil struct ceph_snap_context *snapc); 820de57606cSSage Weil extern void __ceph_flush_snaps(struct ceph_inode_info *ci, 821de57606cSSage Weil struct ceph_mds_session **psession); 822de57606cSSage Weil extern void ceph_check_caps(struct ceph_inode_info *ci, int flags, 823de57606cSSage Weil struct ceph_mds_session *session); 824afcdaea3SSage Weil extern void ceph_check_delayed_caps(struct ceph_mds_client *mdsc); 825afcdaea3SSage Weil extern void ceph_flush_dirty_caps(struct ceph_mds_client *mdsc); 826de57606cSSage Weil 827de57606cSSage Weil extern int ceph_encode_inode_release(void **p, struct inode *inode, 828de57606cSSage Weil int mds, int drop, int unless, int force); 829de57606cSSage Weil extern int ceph_encode_dentry_release(void **p, struct dentry *dn, 830de57606cSSage Weil int mds, int drop, int unless); 831de57606cSSage Weil 832de57606cSSage Weil extern int ceph_get_caps(struct ceph_inode_info *ci, int need, int want, 833de57606cSSage Weil int *got, loff_t endoff); 834de57606cSSage Weil 835de57606cSSage Weil /* for counting open files by mode */ 836de57606cSSage Weil static inline void __ceph_get_fmode(struct ceph_inode_info *ci, int mode) 837de57606cSSage Weil { 838de57606cSSage Weil ci->i_nr_by_mode[mode]++; 839de57606cSSage Weil } 840de57606cSSage Weil extern void ceph_put_fmode(struct ceph_inode_info *ci, int mode); 841de57606cSSage Weil 842de57606cSSage Weil /* addr.c */ 843de57606cSSage Weil extern const struct address_space_operations ceph_aops; 844de57606cSSage Weil extern int ceph_mmap(struct file *file, struct vm_area_struct *vma); 845de57606cSSage Weil 846de57606cSSage Weil /* file.c */ 847de57606cSSage Weil extern const struct file_operations ceph_file_fops; 848de57606cSSage Weil extern const struct address_space_operations ceph_aops; 849de57606cSSage Weil extern int ceph_open(struct inode *inode, struct file *file); 850de57606cSSage Weil extern struct dentry *ceph_lookup_open(struct inode *dir, struct dentry *dentry, 851de57606cSSage Weil struct nameidata *nd, int mode, 852de57606cSSage Weil int locked_dir); 853de57606cSSage Weil extern int ceph_release(struct inode *inode, struct file *filp); 854de57606cSSage Weil extern void ceph_release_page_vector(struct page **pages, int num_pages); 855de57606cSSage Weil 856de57606cSSage Weil /* dir.c */ 857de57606cSSage Weil extern const struct file_operations ceph_dir_fops; 858de57606cSSage Weil extern const struct inode_operations ceph_dir_iops; 859de57606cSSage Weil extern struct dentry_operations ceph_dentry_ops, ceph_snap_dentry_ops, 860de57606cSSage Weil ceph_snapdir_dentry_ops; 861de57606cSSage Weil 862de57606cSSage Weil extern int ceph_handle_notrace_create(struct inode *dir, struct dentry *dentry); 863de57606cSSage Weil extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req, 864de57606cSSage Weil struct dentry *dentry, int err); 865de57606cSSage Weil 866de57606cSSage Weil extern void ceph_dentry_lru_add(struct dentry *dn); 867de57606cSSage Weil extern void ceph_dentry_lru_touch(struct dentry *dn); 868de57606cSSage Weil extern void ceph_dentry_lru_del(struct dentry *dn); 869de57606cSSage Weil 870de57606cSSage Weil /* 871de57606cSSage Weil * our d_ops vary depending on whether the inode is live, 872de57606cSSage Weil * snapshotted (read-only), or a virtual ".snap" directory. 873de57606cSSage Weil */ 874de57606cSSage Weil int ceph_init_dentry(struct dentry *dentry); 875de57606cSSage Weil 876de57606cSSage Weil 877de57606cSSage Weil /* ioctl.c */ 878de57606cSSage Weil extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 879de57606cSSage Weil 880de57606cSSage Weil /* export.c */ 881de57606cSSage Weil extern const struct export_operations ceph_export_ops; 882de57606cSSage Weil 883de57606cSSage Weil /* debugfs.c */ 884de57606cSSage Weil extern int ceph_debugfs_init(void); 885de57606cSSage Weil extern void ceph_debugfs_cleanup(void); 886de57606cSSage Weil extern int ceph_debugfs_client_init(struct ceph_client *client); 887de57606cSSage Weil extern void ceph_debugfs_client_cleanup(struct ceph_client *client); 888de57606cSSage Weil 889de57606cSSage Weil static inline struct inode *get_dentry_parent_inode(struct dentry *dentry) 890de57606cSSage Weil { 891de57606cSSage Weil if (dentry && dentry->d_parent) 892de57606cSSage Weil return dentry->d_parent->d_inode; 893de57606cSSage Weil 894de57606cSSage Weil return NULL; 895de57606cSSage Weil } 896de57606cSSage Weil 897de57606cSSage Weil #endif /* _FS_CEPH_SUPER_H */ 898